Reliability of intra-atrial ECG method of insertion of central venous line through right internal jugular vein when compared to formula and radiological landmark method: a prospective randomized study

Ain-Shams Journal of Anesthesiology

Table 6 Formula vs landmark (post hoc test)

CVC tip position			Group		Total	P
CVC tip position			Formula	Landmark	Total	P
	Within 2 cm above junction	Count	5	25	30	0.001
	Within 2 cm above junction	% within group	16.7%	83.3%	50.0%
	Junction-within 1 cm below junction	Count	2	3	5
	Junction-within 1 cm below junction	% within group	6.7%	10.0%	8.3%
	> 1 below junction	Count	23	2	25
	> 1 below junction	% within group	76.7%	6.7%	41.7%
Total		Count	30	30	60
Total		% within group	100.0%	100.0%	100.0%